Fig. 3From: Low-Intensity Focused Ultrasound-Augmented Multifunctional Nanoparticles for Integrating Ultrasound Imaging and Synergistic Therapy of Metastatic Breast CancerThe 4T1 cellular uptake of CPDP NPs during different time intervals (Blue: DAPI stained 4T1 cells. Red: DiR-labeled CPDP NPs, the scale bar is 50 μm)Back to article page